Question

Two isolated spheres of radii 1 and 2 are charged equally. The ratio of surface charge densities on these

spheres is​

Answer 1

Answer:

Hi buddy

Explanation:

ANSWER

The spheres are conducting (metallic)

Due to repulsion between charger, all charges accumulate at the surface of the spheres.

We define surface charge Density (σ) as :

σ=AQ=4πR2Q   [A : surface area]

So, for equal Q,σαR21

Thus, ratio of surface charge densities between them :

σ2σ1=(R1R2)2 

From question, R1=2cm,R2=4cm

⇒σ2σ1=(24)2=4

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